The density of material in si unit is 128kg m-3. In certain units in which the unit of length is 25 cm and the unit of mass is 50g, the numerical value of density of the material is:
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Answer:
40 units
Explanation:
Physical quantity = n u =constant
Thus n1u1 = n2u2 ( constant )
d = 12.8kg/M³
= 120×10³6/10∧6cm³
50g = 1 unit of mass
Thus, 1g = 1/50 unit of mass
Similarly 25cm = 1 unit of length
Thus, 1cm = 1/25 unit of length
Therefore -
d = 120×10³/10∧6cm³· 9/cm³
= 128×10³/106 ×1/50×/(1/25)³
= 128×(25)³/ 10³×50
= 40 units
Therefore the density of the material is 40 units
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